Improvement in bolt-heading machines



UNITED STATES PATENT OEEIoE.

JAMES KENNEDY AND JOHN KENNEDY, OF PLAINVILLE, CONNECTICUT.

IMPROVEMENT IN BOLT-HEADING MACHINES.

Specification forming part of Letters Patent No. 153,773, dated August4, 1874; application filed May 21, 1874.

To all whom it may concern:

Be it known that we, JAMES KENNEDY and JOHN KENNEDY, of Plainville, inthe county of Hartford and State of Connecticut, have invented a new andImproved Bolt-Heading Machine; and we do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawing forming a part of thisspecification, in whic Figure l is aplan view; Fig. 2, a longitudinalsection; and Fig. 3, a detail view in vertical section.

The invention will first be fully described, and then pointed out in theclaim.

A represents the slide which operates the header B; 0 G theclamping-dies; and D D, the neck-forming dies. The header has a cavity,1), corresponding to the form of head required, and the forming-dies Dhave cavities d d to suit the desired shape of neck. One of the clamps GO has a beveled flange, 0, against which rests the movable neck-die D,while the other clamp and neck-die are stationary, and made, preferably,in one piece. A is a slide that operates header, and has a projection,E, with two wedges, cams, or inclines, e 0, arranged so that both themovable clamp and neck-dies will be carried along together until thebolt-blank is clamped, when the incline 6 will act on the neck-die D atthe same time that the header begins to move. Thus the squaring andstaving up go on together, and both neck'and head are simultaneouslycompleted. The clamp O has its shank O pivoted to a shaft, F, while theneck-squaring die I) has its shank d pivoted at d to shank C the clampbeing provided with a back piece, 0 through which passes a screw, Gr,against the squaring-die. By connecting the dies 0 D in this manner theformer always carries the latter as long as it moves, but does notprevent the continued movement of the neck-squarer afterward. The screwG therefore regulates the distance forward to which the clamp shallcarry the die, and thus determines the relative time when the squarershall commence to move with the header.

Of course, as the stock in rodwill vary, the die 0 will require to bethrown more or less forward. If the stock is at a maximum the die D mayrest against the shoulder of die (3, but as the stock diminishes it mustbe thrown more and more forward by the set-screw G.

The three dies B G D being actuated by the same slide A, their relativeaction is not only necessarily positive and accurate, but is moreeconomically produced.

Having thus described our'invention, what we claim as new is 1. Thecombination, with the same actuating-slide A, having cam-arms E e e, ofthe three dies B O D, as and for the purpose described.

2. The combination, with a set-screw, G, of dies 0 and D, the formerhaving its shank pivoted on the shaft F, and the latter having its shankpivoted to that of the former, as and for the purpose set forth.

3. The combination, with clamping-dies O O D, of a neck-sqnarer. D, anda tool, B b, that both heads and upsets, in the manner specified.

' JAMES KENNEDY. JOHN KENNEDY. Witnesses:

HENRY D. STANLEY, J. L. STANLEY.

